Results 31 to 40 of about 1,345,648 (320)

Monitoring the Petermann Ice Island with TanDEM-X [PDF]

open access: yes, 2012
This paper presents the processing of TanDEM-X acquisitions for the monitoring of the topography of the Petermann ice island. In this particular case the area under study is continuously moving and the acquisition geometry is changing, so the processing ...
Busche, Thomas   +6 more
core   +1 more source

Four‐channel self‐compensating single‐slope ADC for space environments [PDF]

open access: yesElectronics Letters, 2014
A multichannel high‐resolution single‐slope analogue‐to‐digital converter (SS ADC) is presented that automatically compensates for process, voltage and temperature variations, as well as for radiation effects, in order to be used in extreme environmental conditions.
Sordo Ibáñez, Samuel   +10 more
openaire   +4 more sources

A Novel Online Estimation and Compensation Method for Strapdown Phased Array Seeker Disturbance Rejection Effect Using Extended State Kalman Filter

open access: yesIEEE Access, 2019
The radome error and beam pointing error found commonly in the strapdown phased array radar seeker can cause coupling between the missile body motion and the seeker model, impacting the output precision of the seeker and causing the disturbance rejection
Shih-Yao Lin, Defu Lin, Wei Wang
doaj   +1 more source

Postoperative alterations of sagittal cervical alignment and risk factors for cervical kyphosis in 124 Lenke 1 adolescent idiopathic scoliosis patients

open access: yesBMC Musculoskeletal Disorders, 2021
Background This study aims to analyze postoperative changes of cervical sagittal curvature and to identify independent risk factors for cervical kyphosis in Lenke type 1 adolescent idiopathic scoliosis (AIS) patients.
Junyu Li   +12 more
doaj   +1 more source

Novel Model-Based Approaches for Non-Homogenous Atmospheric Compensation of GB-InSAR in the Azimuth and Horizontal Directions

open access: yesRemote Sensing, 2021
Atmospheric disturbance is a main interference for deformation monitoring by GB-InSAR. Most approaches for atmospheric correction are based on the homogenous atmospheric medium assumption that usually does not hold due to complex topography and various ...
Jie Liu, Honglei Yang, Linlin Xu, Tao Li
doaj   +1 more source

Control of PMSM Drive Using Lookup Table Based Compensated Duty Ratio Optimized Direct Torque Control (DTC)

open access: yesIEEE Access, 2023
There are several ways to reduce the ripple magnitude for direct torque-controlled permanent magnet synchronous motor (PMSM) drives. In this work, the compensated duty ratio optimized direct torque control (DDTC-TC) method was proposed to reduce the ...
Berhanu Deggefa Lemma   +1 more
doaj   +1 more source

Iterative Atmospheric Phase Screen Compensation for Near-Real-Time Ground-Based InSAR Measurements Over a Mountainous Slope

open access: yesIEEE Transactions on Geoscience and Remote Sensing, 2020
In this article, an atmospheric phase screen (APS) compensation algorithm for a near real-time ground-based interferometry synthetic aperture radar (GB-InSAR) over a mountainous area is investigated.
Y. Izumi   +3 more
semanticscholar   +1 more source

Highly Nonlinear and Low Confinement Loss Photonic Crystal Fiber Using GaP Slot Core

open access: yes, 2017
This paper presents a triangular lattice photonic crystal fiber with very high nonlinear coefficient. Finite element method (FEM) is used to scrutinize different optical properties of proposed highly nonlinear photonic crystal fiber (HNL-PCF).
Bala, Animesh   +3 more
core   +1 more source

High Precision Compensation for a Total Reflection Prism Laser Gyro Bias in Consideration of High Frequency Oscillator Voltage

open access: yesSensors, 2019
Traditional compensation methods based on temperature-related parameters are not effective for complex total reflection prism laser gyro (TRPLG) bias variation.
Yuanbo Tao   +4 more
doaj   +1 more source

Striation-Based Beamforming with Two-Dimensional Filtering for Suppressing Tonal Interference

open access: yesJournal of Marine Science and Engineering, 2023
Based on the interference spectrogram in the element–frequency domain using the data measured by the horizontal linear array, the source range can be estimated through the striation-based beamforming (SBF) method and its variants.
Pingzheng Li   +8 more
doaj   +1 more source

Home - About - Disclaimer - Privacy